电站锅炉屏式过热器合金钢联箱管接头焊缝退火热处理,过去采用3.5×3.5×14m~3大型煤气加热炉整体退火,消耗大量煤气,且成本高、周期长、形变大,影响产品质量。采用可控硅中频感应加热、电子电位计控制工件加热温度、局部退火热处理新工艺,有良好的节能效果。除提高工效、保证产品质量外,还可节约能源。以生产42片屏式过热器为例,如果用大型煤气加热炉整体退火工艺,要消耗煤气30万m~3,采用新工艺,只用电5,400度。一年节约 In the past, the 3.5 × 3.5 × 14m ~ 3 large gas furnace was annealed as a whole, which consumes a large amount of gas and has high cost, long period and large deformation, affecting product quality . The use of SCR intermediate frequency induction heating, electronic potentiometer control workpiece heating temperature, partial annealing heat treatment of new technology, have a good energy saving effect. In addition to improve work efficiency, ensure product quality, but also save energy. To produce 42 screen superheater, for example, if large-scale gas furnace annealing process, to consume 300,000 m 3 of gas, the use of new technology, electricity only 5,400 degrees. Save one year